The carriers have to make money: texts are used to subsidise other services. If they aren't allowed to charge such a high fee then voice goes up. There are plenty in the UK who barely use voice, so the carriers must find ways of making money from them.
Unless one accepts a general principle against subsidy (which infact I personally do as it obscures, causes distortions and also bubbles) then this isn't an issue. For government to interfere, which is effectively what this article logically ends at, would be absurd since governments are subsidy addicts.
In anycase "it's just a philosophy" is an illogical response. Marxism could be called 'just a philosophy', but equally with Stallman's position it causes human misery and removes human satisfactions by contradicting your nature.
I merely point this matters out for your information, since I am not affected by them in anyway, so that you may live long and prosper.
To do nothing is to be nothing.